This ergonomic chair resembles the look of a conventional task chair, but with the inclusion of kneeling pads. You'll be able to regain your body's natural posture with this ergonomic kneeling chair with included back. Kneeling chairs sit you in a position to allow your diaphragm to move efficiently and promote better breathing and blood circulation. The frame is height adjustable to get into your preferred seat height. Use as your permanent office chair or in conjunction with a conventional task or executive office chair. WL-3520-GG Color Black Made of Fabric, Foam, Mesh, Metal, Plastic Ergonomic Design Ventilated Mesh Back Padded Black Fabric Upholstered Seat Padded Seat and Knee Rest Knee Rest Pads 18.5''W x 10.5''D x 2.5'' Thick Height Adjustable Frame Black Powder Coated Scissor Steel Frame Dual Wheel Casters CA117 Fire Retardant Foam Capacity 250 lbs. Some Assembly Required Warranty Info 2 yr Parts Overall Dimensions 20 W x 27.75 D x 41 42.50 H Seat Dimensions 17.25 W x 12.50 D Back Dimensions 17.25 W x 18.50 H Seat Height 23 25 H